Accordion



Aug. 7, 1928.

A. LANKA ACCORDION Filed May 12, 1927 :IZ'ILIZ] )fll/euZ av: A fur L017? Ki Patented Aug. 7, 1928 UNITED STATES ARTUR LANKA, F GERA GERMANY. i

ACCORDION.

Application filed May 12,

This invention relates to improvements in accordions or similar musical instruments, and more particularly in the means for seating and closing the airvalves of such instruments, and it is the principal object of my invention to provide a novel and improved mechanism for closing the valves tightly, while a spring, tensioned during the opening of the valves by the proper operam tion of'the keys of the instrument, returns the parts into their normal positions.

Another object of the invention is the provision of a valve operating mechanism for musical instruments, preferably accordionsr equipped with means for allowing the simultaneous opening of the valves for the bases and seconds, while permitting a sep: arate operation of these meclianisms by their individual links.

A further object of my invention is the provision of a novel and improved valve closing mechanism for accordions and the like musical instruments replacing the customary spring closure by a system of levers and plates under the action of an adjustable bolt for eifecting a positive and airtight closure .of the valves.

In the accompanying drawing, forming a material part of this disclosure:

Fig. 1 is a sectional fragmentary elevation of an accordion equipped with a novel valve seating mechanism constructed according to my invention.

Fig. 2 is a detail view of the valve seating mechanism per se on an enlarged scale.

As illustrated on the drawing, a link a. is pivotally secured at one end to the angleiron or plate 6 to which is also attached one end of a valve-lifter c fulcrumed intermediate its ends to the head part of a guide member e for the valve-plate (Z secured at one of its ends in any suitable manner to said valve plate (1 and pivoted at its other end to a lug in the instrument, while the extreme outer end of lifter o is attached to said guide member of the valve-plate (Z for ,lifting the same.

The plate I) is also engaged by a threaded bolt f adjustable in a vertical direction by means of the counter nuts 9 on the threaded parts of the bolt, one on each side of an arm of a bracket it through which the bolt passes,

attached to the frame of the accordion or the like, and adapted to firmly engage thevsame for locking the bolt in its adjusted position.

A spring 2' is connected at one end to the as disclosed.

1927. Serial No. 190,821.

upper,- end of bolt 7 and at its opposite end to an arm of the angle plate I); said spring is tensioned during the lifting of the valveplate, and returns the same onto its seat,

in which position the valve lifter 0, the late I), and the bolt 7 are in their stretched. eadcenter, position, in which the valve-plate is firmly held on its seat in order to efii'ect a perfect airtight closure, in which the lower part c of the valve-lifter c is firmly engaging the bass valve-plate (Z, and a displacement of the parts toward the rear is positively prevented.

It will be evident, that the ressure exerted on valve-plate (Z may suita ly be regulated by vthe proper adjustment of bolt f.

Simultaneously with the operation of the bass-plate d the operating mechanism for the second-plate Z, which is similarly constructed as above described with respect to bass-valve plate (1 is operated by a member is normally engaging the plate d and lifted with the same for actuating the operating mechanism for the second plate Z which however can also be Ipperated independently by means of its lin a.

The operation of my novel valve-mechanism will be entirely clear from the ,above detailed description thereof, and it will be clear that a positive, firm and airtightclosure of the valves is achieved by the increase inpressure on the valve-plate, while the pressure on the keys is made independent of the size of the plate, and the operation of the keys is thereby greatly facilitated.

It is to be understood that while I have described and shown the preferred form of constructing my device in practice, such changes as come within the scope of the appended claims may be made in the construction of the minor details thereof without departing from the gist of my invention 1 Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. Valve operating mechanism for keyes em ee kewe ed seed sewer cs1- tion p yem pg an upward movemen a th v a e an. a 9 m aid l v it y t mand 2. e ven er.

Tm; ,mechanisaa to! s werm m ti n and the like musi al ae d ibr e key-wanted and an ula P r ment n uding the r aelve Plate and e o Wh'cli aid link e a curved l ver at a h to id P at and and a valve lifteriormed with said lever t Z h i id' of th valve-9 m firmly eesn a d va e-plate wedding the m air a ainst eat- EWQg me hanism to: key operated accord d like musical n struments compris n a angular plate, a

threaded bolt a rertilca 1y engagin plate at its upp a sp mg e u e. a one nd to an x n on of sai a gular p t nd a its other end to said bolt atthe upper end "ithereof and adjusting counter nuts on said boltfor permitting an adjustment of the pressureion the valve-plate on its seat in its position of rest, and an angular lever secured levers and plates for operating the same upon the operation and release of said keys, a member engaging the bass valve-plate and ,o eratively connected to the second valvep ate'ior operating both the bass and the sec- 30nd alve imul n o y- Signed at Gera, in the county of Thiirinen and State of Germany this 22d day of ecember, A. D. 1927.

ABTUR- LANKA. 

